Wrench.



Patented Sept. 25. |900.

` C. D. SCOTT & B'. M.' EAMICH.

WRENCH.

(Application led Dec. 2S, 1899.) (No Model.)

nvewcoz STATES ATnNr CHARLES D. sCorT AND BRUCE M. EAMICH, orMoRRisoNviLLE, VIRGINIA.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 658,470, datedSeptember 25, 1900.

Application filed December 2S, 1899. Serial No. 741,831. (No model.)

To all whom it may concern.-

Be it known that we, CHARLES D. SCOTT and BRUCE M. EAMICH, citizens ofthe United States, residing at Morrisonville,in the county of Loudounand State of Virginia, have invented certain new and useful Improvementsin Wrenches 5 and we do declare the following to be a full, clear, andexact description of the invention, such as will venable others skilledin the art to which it appertains to make and use the same.

The invention relates to wrenches, and more particularly to that classof wrenches known as the rapid-adjustment type.-

The object of the invention is to provide a wrench of this character bymeans of which a finer adjustment may be attained without decreasing thespaces between the rack-teeth, which would Very materially weaken thewrench in its holding capacity when applied.

In the accompanying drawings, Figure l is aside elevation of ourimproved wrench. Fig.2 is a longitudinal vertical sectional view, andFig. 3 is a cross-sectional view.

Referring to the drawings, 1 denotes the handle of the wrench,terminating in guide extensions 2, provided with a fixed jaw 3.

et denotes a sliding jaw, the shank 5 of which slides between the guideextensions and is held in place by straps 6 and is prevented from beingwithdrawn by the stoppin 7, which engages grooves 8, formed in the sidesof the shank 5. Upon the upper and lower edges of the shank, near therear end, are formed grooves 9, which are adapted to coact with ribs 10,formed on the adjacent faces of the handle extensions.

l1 and 12 denote rack -bars set into the upper and lower edges of theshank to be iiush with the surfaces thereof. The teeth of one rack-baralternate with those of the other rack-bar and are engaged alternatelyby two spring-actuated dogs 13 and 14, provided with push-pins 15, thatextend through apertures in the outer end of the handle extensions andby means of which the dogs are freed from the rack-bars. Assuming theteeth of each rack-bar to be one-eighth of an inch apart, by alternatingthese teeth it will be observed that the sliding jaw may be adjusted thedistance of one-sixteenth of an' inch; whereas if the teeth did notalternate to secure this one-sixteenth of an inch adjustment it would benecessary to have the teeth but one-sixteenth of an inch apart, and thiswould materially weaken them. By alternating them we can employ muchlarger teeth, and thereby secure additional strength and at the sametime get the same adjustment as if the teeth were much smaller thanone-sixteenth of an inch apart. By referring to Fig. 2 it will benoticed that at no one time do both dogs engage the teeth. When one dogis in engagement with its set of teeth, the other is out of engagementwith the other set of teeth.

From the foregoing description, taken in connection with theaccompanying drawings, the construction, operation, and advantages ofour improved wrench will be readily apparent without requiring anextended explanation.

. It will be seen that the device is simple of construction, that saidconstruction permits of its manufacture at small cost, and that it isexceedingly well adapted for the purpose vfor lwhich it is designed.

It will of course be understood that various changes in the form,proportion, and the minor details of construction may be resorted towithout departing from the principle' or sacrificing any of theadvantages of this invention.

Having thus fully described our invention, what We claim as new, anddesire to secure by Letters Patent of the United States, is-

The combination with the handle of a wrench terminating in guideextensions 2 provided with a fixed jaw 3, said extensions near theirrear ends having formed upon their adjacent faces, ribs 10, andtheadjacent faces of the extensions at their forward end being formed withdog-chambers, of a shank 5, provided with a fixed jaw 4 and having agroove 8 in its side, straps 6 surroundingsaid handle extensions and theshank, astop-pin 7 extending through said strap into said groove, saidshank having in its sides near its rear end, grooves 9 to be engaged bythe our hands in presence of two sbseribng ribs 10, mok-bars l1 12,secured to said shank, witnesses. the teeth of one rack-bar alternatingwith 1 the teeth of the othel` rack, and sprng-acl COTVl 5 tuated dogspvoted in said dog-chambers t and adapted to alternatelyengage .theteeth Witnesses: of said racks, substantially as specified. JOHN M.DINGES, In testimony whereof We have hereunto set (J. L. WILEY.

